Maintenance And Inspection - Hitachi UC 12SC Handling Instructions Manual

CHARGING
Before using the power tool, charge the battery as follows.
1. Insert the battery in the charger.
Position the battery so that the nameplate faces
toward the HITACHI label of the charger and press
in the battery unitl it comes into contact with the
bottom plate. (See Fig. 1 and Fig. 2)
2. Connect the charger power cord to the AC outlet.
Connecting the power cord will turn on the charger
(the pilot lamp lights up).
CAUTION
If the pilot lamp does not light up, pull out the
power cord from the AC outlet and check the
battery mounting condition.
3. The pilot lamp goes off when the battery is fully
charged.
Regarding recharging time
Table 1 shows the recharging time required according
to the type of battery.
Table 1 Type of battery and recharging time
(at temperature 20°C)
Type of battery Recharging time
EB12 Approx. 60 minutes
EB12G Approx. 90 minutes
EB12B Approx. 105 minutes
NOTE: The recharging time may vary according to the
ambient temperature and the power supply
voltage
(Minutes)
100
90
80
70
60
50
40
30
20
10
0
Rated voltage
95% of
(Voltage Listed
Rated Voltage
on Nameplate)
Input Power Supply Voltage
Fig. 3 Relationship Between Input Power Supply Voltage
and Charging Time
Ambient temperature
10°C
20°C
Battery: EB12
105% of
Rated Voltage
An example of the relationship between the input
power supply voltage and the charging time when
battery model EB12 is charged is shown in Fig. 3.
The charging time decreases if the ambient
temperature and input power supply voltage are
high and increases when they are low.
CAUTION
If the battery is heated due to direct sunlight,
etc., just after operation, the charger pilot lamp
may not light. At that time cool the battery first,
then start charging.
4. Disconnect the charger power cord from the AC
outlet.
5. Hold the charger tight and pull out the battery.

MAINTENANCE AND INSPECTION

1. Inspecting the mounting screws
Regularly inspect all mounting screws and ensure
that they are properly tightened. Should any of the
screws be loose, retighten them immediately. Failure
to do so could result in serious hazard.
2. Cleaning of the charger
When the charger is stained, wipe with a soft dry
cloth or a cloth moistened with soapy water. Do not
use chloric solvents, gasoline or paint thinner, for
they melt plastics.
3. Store idle charger
When not in use, the charger should be stored in
dry, high or locked-up place—out of reach of children.
NOTE
Due to HITACHI's continuing program of research and
development, the specifications herein are subject to
change without prior notice.
English
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